Diablo 3 time played


Howdy, folks.

I have a nice project in mind for filtering/ordering the Diablo 3 season ladder, but it involves playtime, along with other metrics.
The only playtime I could manage to find, however, was the ratio between class and account total.
Is there any way to use those numbers to generate absolute numbers in order to compare playtime between players, much like you can inside the game client, or is that hidden information Blizzard doesn’t share? If Blizzard doesn’t, what do you guys think would be the chance they change it?

Thanks in advance.